<?php
/**
 * This class holds shared data for Ajax operations.
 *
 * But Singleton is not working properly and every
 * getInstance() creates new instance instead of using
 * static one.
 *
 * @file    AjaxSharedData.php
 * @author David Alexa <alexa.david@me.com>
 *
 * Copyright (C) 2012-2013 CESNET
 *
 * LICENSE TERMS
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of the Company nor the names of its contributors
 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * ALTERNATIVELY, provided that this notice is retained in full, this
 * product may be distributed under the terms of the GNU General Public
 * License (GPL) version 2 or later, in which case the provisions
 * of the GPL apply INSTEAD OF those given above.
 *
 * This software is provided ``as is'', and any express or implied
 * warranties, including, but not limited to, the implied warranties of
 * merchantability and fitness for a particular purpose are disclaimed.
 * In no event shall the company or contributors be liable for any
 * direct, indirect, incidental, special, exemplary, or consequential
 * damages (including, but not limited to, procurement of substitute
 * goods or services; loss of use, data, or profits; or business
 * interruption) however caused and on any theory of liability, whether
 * in contract, strict liability, or tort (including negligence or
 * otherwise) arising in any way out of the use of this software, even
 * if advised of the possibility of such damage.
 */
namespace FIT\NetopeerBundle\Models;

/**
 * This class holds shared data for Ajax operations
 */
class AjaxSharedData {
	/**
	 * @var array   shared data
	 */
	protected $data;

	/**
	 * @var AjaxSharedData  instance for singleton
	 */
	protected static $instance;

	/**
	 * Constructor
	 */
	protected function __construct() {
    
  }

	/**
	 * Get instance of this class
	 *
	 * @todo  Is not working correctly, creates new instance every time.
	 * @return AjaxSharedData
	 */
	public static function getInstance() {
      if (!isset(static::$instance)) {
          static::$instance = new static;
      }
      return static::$instance;
  }

	/**
	 * Set keys and values of shared data array
	 *
	 * @param mixed $key
	 * @param mixed $arrayKey
	 * @param mixed $value
	 */
	public function setDataForKey($key, $arrayKey, $value) {
    if (!isset($this->data[$key])) {
      $this->data[$key] = array();
    }
  	$this->data[$key][$arrayKey] = $value;
  }

	/**
	 * Get value from shared data array
	 *
	 * @param mixed   $key    key of shared array
	 * @return mixed
	 */
	public function getDataForKey($key) {
  	return $this->data[$key];
  }
}
